src/test/compile-fail/asm-out-assign-imm.rs

   1 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // ignore-s390x
  12
  13 #![feature(asm)]
  14
  15 fn foo(x: isize) { println!("{}", x); }
  16
  17 #[cfg(any(target_arch = "x86",
  18           target_arch = "x86_64",
  19           target_arch = "arm",
  20           target_arch = "aarch64"))]
  21 pub fn main() {
  22     let x: isize;
  23     x = 1; //~ NOTE first assignment
  24     foo(x);
  25     unsafe {
  26         asm!("mov $1, $0" : "=r"(x) : "r"(5));
  27         //~^ ERROR re-assignment of immutable variable `x`
  28         //~| NOTE re-assignment of immutable
  29         //~| NOTE in this expansion of asm!
  30     }
  31     foo(x);
  32 }
  33
  34 #[cfg(not(any(target_arch = "x86",
  35               target_arch = "x86_64",
  36               target_arch = "arm",
  37               target_arch = "aarch64")))]
  38 pub fn main() {}